Wrench.



J. AASEN WRENCH.

APPLICATION FILED O0T.4, 1909.

974,33 1 Patented Nov. 1, 1910.

\ if v FIG. 4. FIG. 5.

M WITJVESSES: I mfg-on Mm (f- M-l/A y gi Z130 ATT Elf-Ex places in machinery. This and other ob- UNITED sTA'rEs BTENT OFFICE.

JOHN AASEN, 0F HATTON, NORTH DAKOTA.

WRENCH.

To all whom it may concern:

Be it known that I, J OHN Aasen, a citizen of the United States, residing at Hatton, in the county of Traill and State of North Dakota, have invented a new and useful Wrench, of which the following is a specification.

My invention relates to wrenches and the principal object is to provide a novel, inexpensive and convenient wrench for reaching and turning nuts and cap screws in narrow jects I attain by the construction and arrangement of parts illustrated in the accompanying drawing, in which Figure 1 is what may be called a top view of my wrench. Fig. 2 is an edge view of it. Fig. 3 is a section substantially on line a-a of Fig. 2. Fig. at is a detail view of one of the jaws of the wrench, showing the face of it that contacts with a similar face of the other jaw. Fig. 5 is a front end view of the wrench. Fig. 6 1s a detail rear end view of the collar 24. in Figs. 1, 2 and 3. Fig. 7 is a detail view of a pivot bolt that holds the two jaws to the handle, and the adjacent part of the handle and bushing therein in section.

Referring to the drawings by reference numerals, l designates the handle of the wrench and may be made of any suitable material, preferably it may be cast hollow as indicated by the dotted line 2 in Fig. 1. Snugly fitted in a socket 3 in the front end of the handle and retained therein by a pin 1, is the stem 5 of the Wrench head 6, which head has a flat arm 7, to which the flat semicircular plates 8 and 8 of the jaws 9 and 9 of the wrench, are pivotally secured by a bolt 10, which has at one end a thumb nut 11, and at the other end a flat head 12, near which is a fiat portion 13, engaging in a slot 14, transversely arranged in the jaw plate 8, whereby said plate is adjustable in transverse direction of the plate 8, both plates having their adjacent faces provided with inter-meshing longitudinal corrugations 15, adapted to hold the plates firmly in any position to which they may be adjusted before the thumb nut 11 is tightened, according to the size of nut or bolt head that is to fill the space between the jaws 9 and 9. The corrugated plates are slightly beveled or wedge-shaped in opposite directions so as to make both jaws strong at the points 16,

Specification of Letters Patent.

Application filed October 4,

where they join said plates. 7 is a bushing Patented Nov. 1, 1910.

1909. Serial No. 520,998.

on the bolt to prevent the nut from pinching the arm 7.

The plate 8 is provided upon its curved edge with teeth 17, adapted to be engaged by two dogs 18, which are pivoted at 19 in oppositely disposed grooves 20 in the wrench head and are normally engaged with said teeth by springs 21 provided in said grooves and acting in outward direction on the portions 22 rearward of the pivot point of each dog. Said rear portions of the dogs are slightly bulged or curved outward so as to engage an internal rim 23 of a collar 24, (best shown in Fig. 6) which by such engagement is retained in place upon the neck of the wrench head even when the handle of the wrench may be removed from the stem 5, and if the handle is in place it also helps to keep the collar in place; the neck also has a shoulder 28 in front of the collar. Said collar is provided upon its inner periphery with two diametrically opposite cams 25, by which both dogs may have their rear ends pressed inward, whereby their front ends are disengaged from the teeth 17; it also has two other cams 26 and 27 disposed to one side of a diametrical line through the collar, so that each of them may alternately depress one of the dogs and thus enable the other dog to act as a ratchet dog upon the teeth 17. The cams 25 are of little use and may therefore be omitted.

Having thus described my invention, what I claim is:

1. A wrench comprising a handle with a flat front end, a palr of jaws having overlapping flat rear portions or plates provided upon t eir adjacent faces with longitudinal corrugations, one of the plates having a transversely slotted hole and the other a round hole, a pivot bolt passed through said holes and through the flat portion of the handle, a thumb nut on the end of the bolt, 2. bushing in the handle near the nut, and means near the head of the bolt to en age in the slotted hole to prevent turning o the bolt therein.

2. A Wrench comprising a handle with a flat front end, of a pair of jaws having overlapping fiat rear portions or plates provided upon their adjacent faces with longitudinal corrugations, one of the plates having a transversely slotted hole and the other a round hole, a pivot bolt passed through said holes and through the fiat portion of the handle, a thumb nut on the end of the bolt,

and means near the head of the bolt to engage in the slotted hole to prevent turning of the bolt therein, one of said jaw plates having a semicircular toothed edge, two oppositely disposed dogs pivotally mounted on the handle and having springs normally engaging them with said toothed edge, and a collar rotatable on the handle and having two cams adapted each of them to press upon the rear portion of one of the vdogs and thereby hold alternately one dog disengaged from the toothed edge.

3. A wrench comprising a handle with a flat front end, of a pair of aws having overlapping flat rear portions or plates provided upon their adjacent faces with longitudinal corrugations, one of the plates having a transversely slotted hole and the other a round hole, a pivot bolt passed through said holes and through the flat portion of the handle, a thumb nut on the end of the bolt, and means near the head of the bolt to engage in the slotted hole to prevent turning of the bolt therein, one of said jaw plates having a semicircular toothed edge, two oppositely disposed dogs pivotally mounted on the handle and having springs normally engaging them with said toothed edge, and a collar rotatable on the handle and having two cams adapted each of them to press upon the rear portion of one of the dogs and thereby hold alternately one dog disengaged from the toothed edge.

4. A wrench comprising a handle with a flat front end, of a pair of jaws having overlapping flat rear portions or plates provided upon their adjacent faces, with longitudinal corrugations, one of the plates having a transversely slotted hole and the other a round hole, a pivot bolt passed through said holes and through the flat portion of the handle, a thumb nut on the end of the bolt, and means near the head of the bolt to engage in the slotted hole to prevent turning of the bolt therein, one of the said jaw plates having a semicircular toothed edge, two oppositely disposed dogs pivotally mounted on the handle and having springs normally engaging them with said toothed edge, and a collar rotatable on the handle and having two cams adapted each of them to press upon the rear portion of one of the dogs and thereby hold alternately one dog disengaged from the toothed edge, said handle being made in two sections of which the front section has a rearward stem and the rear section having a socket removably secured upon the stem and butting against said collar, and the front portion of the handle having a shoulder meeting the front end of the collar.

In testimony whereof I aflix my signature, in presence of two witnesses.

. JOHN AASEN.

lVitnesses A. HANSON, G. S. THOMPSON. 

